SiteSmith, a provider of "managed" Internet services, and Equinix, a neutral Internet traffic exchange and co-location company, have signed a co-marketing partnership. SiteSmith, which handles Internet-related chores for small companies, will sell its services to Equinix's customer base while Equinix stands to gain new hosting customers via SiteSmith. The collaboration marks the latest in the growing market for outsourced Net services and infrastructure needs.